ME3 in general really likes the mystery-->revelations setup, although obviously opinions are sharply divided on how much of that stuff really worked. The comics are generally very shallow in execution, too, although I really do think the Invasion four-parter stands with the recently-released Homeworlds: Garrus as the cream of a somewhat rancid crop.

So yeah, given BioWare's track record with tie-in media, I wouldn't count Omega out as being identically shallow to Invasion, its setup piece. Then again, sometimes things wind up more shallow in the games (I actually like Kai Leng, unlike A LOT of fans, but his racist angle was played down so much in ME3, dammit) so again, good to wait to hear from people ya trust before forking over dough if you're unsure.